Improvement in circular saw-mill



iii-niiet Ctoiea met Gemine.

Letters Patent N o. 94,638, dated September 7, 1869.

IMPROVEMENT IN CIRCULAR SAW-MILL.

The Schedule referred to in these Letters Patent andy making part of the lsame.

To whom Iit may concern Be i`t known that I, FRANCIS PARKER, of the town of Cato, in Cayuga county, New York, have invented a new a d improved mode of constructing Saw-Mills, or Mill or Cutting Lumber from Logs; and I do hereby declare the following to be a full, clear, and exact description of 'the same, reference being had to the accompanying drawings, making a part of this specification, and to the letters of reference marked thereon.

The object of this invention is to save time in operating mills used in cutting lumber from logs. And to attain this object, I make the power that propels the saw do the work of feeding up the log after the saw has passed through.

And also the use ofthe same power to raise the circular saw for the purpose, in large timber, of cut- -ting half thedepth of the entire cut by one passage the propel' distance, to allow the same to pass under the log, and by a reverse motion of the carriage,.com plete the cut."

In order that others may know how to make and use my invention, I will proceed to describe its construction and mode of operation.

Figure 1 is a plan of the several parts of my invention;

'Figure 2 is au elevation of one side, showing some of the parts and their relation to each other;

Figure 3 is a view of one end; 'and Figure 4 is a view of the opposite.

A is the driving-shaft, from which all the parts of -the mill are driven.

The belt B connects the shafts A and C.

0n the shaft C are two bevel-wheels, D and E. Both engage the wheel F.

Theshaft() is stationary, except when turned by connecting the clutch G with the wheel D.

The shait C has three bearings at H I J, audit extends through the entire width of the mill.

The belt K passes around the 0saine pulley with the belt B.

This pulley and the wheel E are made of one piece, and turn freely on the shaft C.

The belt K passs over the pulley L, on the shaft M, on which is apiuion, N, engaging the rack O, the upper end 0f which is attached to the slide Q.

This slide has attached to it the mechanism It, snpportingthe saw-mandrel S, ou which hangs the saw T.

When it is desirable to raise the saw, the belt K is tightened so as to turn the shaft M, and byits connection with the saw above described, the saw will be raised to any desirable height, and is secured in that position until it is required to be lowered.

This is accomplished by the gravitating force of the Weight of the slide, mandrel, and saw, regulated by a friction-brake, I,acting against -the pulley L, or by taking hold of the same with the hand, and by this means, controlling its descent to the point required.

This completes the description and mode of operating one part'of my invention, that of raising and lowering the saw, for the purpose above described.

The rod U and lever V operate the clutch XV.

When the clutch G is made to engage the wheel D, motion is given to the shaft C. l

By pulling the rod U, causing the clutch W to engage the wheel X, (see iig. 2,) the band or chain Y is set in motion, carrying with it the pulleys Z Z,vaud

the two wheels A A', connected with aud operating the screws B B' in the head-blocks C' C Ordinary saw-,mill dogs may be used in these hcadblocks, and the screws B' B' inserted through nuts attached thereto, but as these are not of my invention, nothing further need be said of them here.

D is a rack, and is operated by the chain or cord E.

Said cord is looped around the pulley F;

The cordon the left-hand side of said pulley, as represented in the drawings, is brought `forward and passed around G', (shown partly in dotted lnes,) and taken to the right-hand end of rack D', and attached thereto. The cord on the right-hand side is passed around thesame pulley and fastened to the opposite end of said. rack. Y

To the rack D is-affxed a stub, H.

Beneath the rack D is a rofl, J', with a wing, H" projecting from the side thereof..

Said rod extends to the opposite side of mill, and

has the end I', bent up at right 4angles to the main portion. This is used for a handlr.

The distance between the stand H and the end of i the lever K', projecting out from and forming a part of the lever V, determines the distance the feed will operate in moving the log toward the saw.

After the saw has passed through the log, and while the carriage is at rest, by bearing down the handle I', on the rod J', the wingH" will4 lift the rack into gear with the pinion L. Thenfby aid of the rod the clutch W is made to engagethe wheel X,'the pinion L being attached' thereto, the'log will be fed forward until the stand H strikes the end of thelever K,`and disengages the clutch from the wheel X.

Having above described the construction and mode of operating my invention,

What I claim as new, and wish to secure by- Letters Patent, is

The belt K, pulley L, shaft M, pinion N, rack O,

and slidev Q, constructed and arrau ged to operate substantially as described, and for the purpose specified.

FRANCIS PARKER. Witnesses:

T. B. BROWN, A. BARRETT. 

